[Repeater-Builder] Hello all and a question about Midland
Hello all. I'm new to the group and am looking for info on interfacing my Midland 70-0351C 6mtr radio to an SCom 7k controller as a remote base. I need the wireing diagrams to be able to do this. Thanks.
[Repeater-Builder] Re: Help me in selecting a GMRS repeater antenna
Thanks for everyones help. I think the tripod mount will hold the top section of the 420. I will give it a shot this week. The DB420 has been sitting in my garage for a couple of years after being given to me because it was being thrown out. One mans junk is anothers treasure I guess. I was amazed at the size of the monster after the two sections were joined. I was impressed, but the wife was not! Special thanks to Chuck Kelsey for his very imformative off-list response. Again, thanks Preston Moore, N5YIZ __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
[Repeater-Builder] Motorola Micor Repeater Assistance
Our ARES Group has recently acquired a number of Micor UHF radios that were in service as commerical repeaters. We are looking to have them converted to UHF ham frequencies (first frequency already coordinated) and made serviceable for our group. If you are aware of any good Micor repair facilities, please advise, or if you know of a link or post already on here, please direct me. 73, Hal, KI2U Washington County ARES AEC
[Repeater-Builder] filter
Dear all, Can anybody help me to give the design idea of the low pass filter having pass frequency of 470-474 MHz and notch at the frequency 482-488 MHz. Thanks in advance . - Check out what you're missing if you're not on Yahoo! Messenger
Re: [Repeater-Builder] Motorola Micor Repeater Assistance
galaxymap wrote: Our ARES Group has recently acquired a number of Micor UHF radios that were in service as commerical repeaters. We are looking to have them converted to UHF ham frequencies (first frequency already coordinated) and made serviceable for our group. If you are aware of any good Micor repair facilities, please advise, or if you know of a link or post already on here, please direct me. http://www.repeater-builder.com/rbtip/customrepair.html Kevin
RE: [Repeater-Builder] DB420 performance?
Eric, I am using a commercial (450-470 split) antenna at 500 feet and it works great. Be sure and tighten all screws, nuts and clamps and seal all connections before putting it in the air. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed Sent: Sunday, April 29, 2007 9:21 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] DB420 performance? Good Evening, I have a site with a PD455-5 at 400ft that has failed me after 10 years of service. The reflected power has risen to about 10% of the forward power, and coverage is drastically reduced. Rather than installing another PD455-5 (which will most likely fail in another 10 years due to the fact that it is top mounted without a support brace at the top), I was considering a folded dipole array. I hear that the DB420 is no longer made for the 440-450 split. Can I use a 450-470 split antenna at 443MHz without seeing any noticable performance degredation? Is it worth the extra money switching to the DB420? Also, I have considered using a PD-1151. Has anyone done any real- world comparison between the 10db PD455 and the 8db PD1151? Thanks Eric KE2D Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/779 - Release Date: 4/28/2007 3:32 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/780 - Release Date: 4/29/2007 6:30 AM Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
Re: [Repeater-Builder] DB420 performance?
I have had the opportunity to check the db408 with an Anritsu, the antennas seem to have very low VSWR at 442.4, 447.1, 453.4 and the best at 459.8...I don't see why these wont work great throughout the band. Lance N2HBA - Original Message - From: Paul Finch [EMAIL PROTECTED] To: Repeater-Builder@yahoogroups.com Sent: Monday, April 30, 2007 8:10 AM Subject: RE: [Repeater-Builder] DB420 performance? Eric, I am using a commercial (450-470 split) antenna at 500 feet and it works great. Be sure and tighten all screws, nuts and clamps and seal all connections before putting it in the air. Paul -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed Sent: Sunday, April 29, 2007 9:21 PM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] DB420 performance? Good Evening, I have a site with a PD455-5 at 400ft that has failed me after 10 years of service. The reflected power has risen to about 10% of the forward power, and coverage is drastically reduced. Rather than installing another PD455-5 (which will most likely fail in another 10 years due to the fact that it is top mounted without a support brace at the top), I was considering a folded dipole array. I hear that the DB420 is no longer made for the 440-450 split. Can I use a 450-470 split antenna at 443MHz without seeing any noticable performance degredation? Is it worth the extra money switching to the DB420? Also, I have considered using a PD-1151. Has anyone done any real- world comparison between the 10db PD455 and the 8db PD1151? Thanks Eric KE2D Yahoo! Groups Links No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/779 - Release Date: 4/28/2007 3:32 PM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/780 - Release Date: 4/29/2007 6:30 AM Yahoo! Groups Links Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/Repeater-Builder/ * Your email settings: Individual Email | Traditional * To change settings online go to: http://groups.yahoo.com/group/Repeater-Builder/join (Yahoo! ID required) * To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] * To unsubscribe from this group, send an email to: [EMAIL PROTECTED] * Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
[Repeater-Builder] Re: T-Band Filter (notch)
Re: T-Band Filter (notch) At first glance there appears to be enough distance between the two frequency ranges. You might get away with a well designed notch network at/in the higher side 482 range. If you were crafty you could simply Tee the notch network into your 470-474 feedline. Do you want to go with the low cost answer, the much labor and time spent answer or the spend money and be done with it answer? cheers, skipp sms mms [EMAIL PROTECTED] wrote: Dear all, Can anybody help me to give the design idea of the low pass filter having pass frequency of 470-474 MHz and notch at the frequency 482-488 MHz. Thanks in advance .
Re: [Repeater-Builder] DB420 performance?
On 4/29/07, kk2ed [EMAIL PROTECTED] wrote: Is it worth the extra money switching to the DB420? I'll throw a comment here... If you're going to spend the big bucks, the heavy-duty Sinclair folded-dipole arrays are also wonderful antennas. Nate WY0X
[Repeater-Builder] Re: DB420 performance?
while i havent used them my self, i have seen them fall apart on a tower.. the folded dipole sinclair antennas, on the vhf split.. we have some of their dB counterparts on the same tower, same age or older, and while electrically the dB antennas have degraded significantly, all the lobes are still attached! the sinclair i saw had the upper lobe broken off the mast, flying in the wind.. striking some 6 rigid copper feedline for a tv station! your mileage my vary but those antennas arent very neighborly! be advised, there was a recent production problem with some andrew folded dipoles.. either the 224 or 264, i cant remember, but it is the one with the internal harness.. there was a production change leading to performance degradation after a few months in service, though i understand this has since been corrected.. --- In Repeater-Builder@yahoogroups.com, Nate Duehr [EMAIL PROTECTED] wrote: On 4/29/07, kk2ed [EMAIL PROTECTED] wrote: Is it worth the extra money switching to the DB420? I'll throw a comment here... If you're going to spend the big bucks, the heavy-duty Sinclair folded-dipole arrays are also wonderful antennas. Nate WY0X
[Repeater-Builder] New repeater Motorola or MA/COM
Who is making the best repeater these days? Motorola or MA/Com formaly GE? -- -Tim
RE: [Repeater-Builder] New repeater Motorola or MA/COM
Tim, Now THAT'S a loaded question. hehehehe Be prepared - now you'll get responses from Motorola fans, GE/Ericsson/MA-Com/Tyco fans, Kenwood, et al. So now it becomes a question of: new vs. old equipment; what purpose of usage (commercial vs. ham); etc. Ad Nauseum Mark - N9WYS _ From: Repeater-Builder@yahoogroups.com On Behalf Of [EMAIL PROTECTED] Who is making the best repeater these days? Motorola or MA/Com formaly GE? -- -Tim
Re: [Repeater-Builder] New repeater Motorola or MA/COM
N9WYS wrote: Tim, Now THAT'S a loaded question. hehehehe Be prepared - now you'll get responses from Motorola fans, GE/Ericsson/MA-Com/Tyco fans, Kenwood, et al. So now it becomes a question of: new vs. old equipment; what purpose of usage (commercial vs. ham); etc. Ad Nauseum Mark - N9WYS Who is making the best repeater these days? Motorola or MA/Com formaly GE? Indeed-a VERY loaded question. I happen to like all three of of the ones mentioned, if you stay in the same class when you compare (unlike car companies ;c). Compare an MTR2000 to a TKR-750/850 (M/A-Com doesn't have a low end repeater.) Compare the MastrIII to a Quantar or a TKR-7400/8400 for a high end repeater. They're all pretty good. -- Jim Barbour WD8CHL
Re: [Repeater-Builder] Re: DB420 performance?
On 4/30/07, Merritt [EMAIL PROTECTED] wrote: while i havent used them my self, i have seen them fall apart on a tower.. the folded dipole sinclair antennas, on the vhf split.. we have some of their dB counterparts on the same tower, same age or older, and while electrically the dB antennas have degraded significantly, all the lobes are still attached! I specifically stated the heavy-duty (modern) models. Are you talking about the newer heavy duty models with the cable harness enclosed inside the mast and shipped as a single unit, or the older style that you mounted to your own mast with provided brackets? Also the HD models are made of much stouter material than the standard models. They also have low-IMD models for sites where passive intermod is a problem. the sinclair i saw had the upper lobe broken off the mast, flying in the wind.. striking some 6 rigid copper feedline for a tv station! your mileage my vary but those antennas arent very neighborly! I think you're thinking of the older models. I don't think I have the upper body strength to snap any of the pieces, including the dipoles themselves, off of the HD models, even if I tried. They're made of very large tubing. I'd have to stand on it on the ground and pull with both arms to do any serious damage to the antenna, I'm sure. be advised, there was a recent production problem with some andrew folded dipoles.. either the 224 or 264, i cant remember, but it is the one with the internal harness.. there was a production change leading to performance degradation after a few months in service, though i understand this has since been corrected.. Both manufacturers have seen problems like this over the long haul. It happens. Sucks when your antenna does it, too. I believe Skipp has had a problem with one of the made in Mexico Sinclairs about 1/2 a year ago. Nate WY0X
RE: [Repeater-Builder] Re: DB420 performance?
the sinclair i saw had the upper lobe broken off the mast, flying in the wind.. striking some 6 rigid copper feedline for a tv station! your mileage my vary but those antennas arent very neighborly! I think you're thinking of the older models. I don't think I have the upper body strength to snap any of the pieces, including the dipoles themselves, off of the HD models, even if I tried. They're made of very large tubing. I'd have to stand on it on the ground and pull with both arms to do any serious damage to the antenna, I'm sure. Even the older models were built like a tank. Much stronger than any of the other standard antennas on the market. I think you could climb on the Sinclair antenna and not harm it. They did make a lighter version with external cable harness that was not as hefty but still a very good antenna. I have a couple of the lighter NOS Sinclair antennas for UHF if anyone is interested. The model is 334-2. 6 db omni/ 8.5 db offset. $243.00 each. These are UPS shippable as they have a split mast with coupler. 73 Gary K4FMX
Re: [Repeater-Builder] New repeater Motorola or MA/COM
At 11:24 AM 04/30/07, you wrote: Who is making the best repeater these days? Motorola or MA/Com formaly GE? -- -Tim That's a flamewar baiting question ! on the same level with politics, religion and sex... You'll find proponents of every brand out there... from Aerotron to the little M (Midland) to Yaesu. And then you will have the totally unexpected answer fly past you... Locally, we have one guy who feels that if it doesn't glow in the dark it's not a real repeater. He's still running GE Progress line on 220 and 440... and it's funny, he goes to the radio site for maintenance trips maybe 1/4 as often as the guys that run Mastr IIs or Micors. And the repeaters don't key up from grunge and intermod as often. When asked, he comments that maybe its because the 3rd order intercept point of a RF stage that has 150v on the plate is higher than one that has 10v on the collector and he loves to pull the chain of the newbies that have never seen a tube other than the face of a CRT with answers like you need to adjust the grid bias, then dip the plate when asked questions about why his systems work so well. Mike WA6ILQ
Re: [Repeater-Builder] New repeater Motorola or MA/COM
I'll take Motorola And EF Johnson Repeaters anytime over the Others . Just my Two cents ... lol 73 Steve. EF Johnson Tech Motorola Tech . ** See what's free at http://www.aol.com.
[Repeater-Builder] FS: DB Products DB4076W-A Duplexer - Relisted
Anyone building a UHF repeater, I have a DB Products DB4076W-A rack mount duplexer that was just taken out of commercial service. The repeater was replaced with a new Icom that had a built-in duplexer. It's a 4 cavity bandpass/band reject duplexer and is listed for 450 to 470. I've seen many of these in amateur service so I'm pretty sure it can be tuned down to 440 without too much trouble. This one's in decent shape with only a few scratches and all the double shielded cavity interconnect cables and connectors are intact. Asking $300 shipped anywhere in the US. Anyone interested email me off list - [EMAIL PROTECTED] A person from this list had sent me an email saying Consider it sold and he was to send me a money order on the 7th of April So far, no money order. He contacted me A week ago last Saturday with the excuse that the post office returned it because the clerk had charged him for the delivery confirmation, but not postage and it was returned for insufficient postage -- he said he was remailing it then. That's been over a week ago, and still nothing. The duplexer is back on the market.
RE: [Repeater-Builder] New repeater Motorola or MA/COM
That reminds me of a time (many years ago) when I worked for Motorola. One of the Motorola salesman was telling some of the other Motorola salesmen about a system he had sold some radios into and how there were some coverage problems. Upon discovering that there were a few GE handheld radios in the system several of the salesmen said well that's the problem , There is no way those GE radios are going to work as well a Motorola radio. Funny part of it was that most of the salesmen really believed that. Talk about a religious leader.. :-) 73 Gary K4FMX _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Nate Duehr Sent: Monday, April 30, 2007 3:41 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] New repeater Motorola or MA/COM On 4/30/07, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote: Who is making the best repeater these days? Motorola or MA/Com formaly GE? That would be a question best suited for your favorite religious leader, probably. ;-) First, define: best... If all you want is anecdotes, I can personally say that I've seen the current generation Motorola and M/ACom products both in operation 24/7 in various public safety and Amateur radio applications in the local area, and they both appear to work fine. But that's probably not what you wanted. Nate WY0X
RE: [Repeater-Builder] New repeater Motorola or MA/COM
Steve and all, FWIW - We [Will County (IL) EMA] have four EF Johnson base/repeater units installed in a trailer designed for interoperability here in Illinois, and we've had nothing but problems with them. First the VHF went south (and were eventually replaced - by Johnson - with mobiles for our application) and now the UHF has gone likewise. There are 9 such trailers throughout Illinois (coined ITECS for Illinois Transportable Emergency Communications System) developed and paid for by the Joint Terrorism Task Force (JTTF) and all are experiencing the same problems. Supposedly a factory rep form Johnson wasn't even able to resolve the issues. YMMV. Mark - N9WYS Asst Chief - Operations, Will County (IL) EMA / Field Services Division _ From: Repeater-Builder@yahoogroups.com On Behalf Of [EMAIL PROTECTED] I'll take Motorola And EF Johnson Repeaters anytime over the Others . Just my Two cents ... lol 73 Steve. EF Johnson Tech Motorola Tech
Re: [Repeater-Builder] New repeater Motorola or MA/COM
Mike, yours is a very good comment, Moto / MA/COM. Probably the best approach would be to compare specifications, and take a good look at each product for serviceablilty. Don't forget EF Johnson - I have 10 or 15 of their VX series, and 5 or 6 M3, and a handful of Kenwood TKR820's and such that I use in my own LTR trunking systems. By large and far, modern equipment has been very trouble free. In my real life I maintain 78 MA/COM M3, 800 Mhz Edacs repeaters, 4 Sites, 19 channels per site, simulcast, with a couple of NPSPAC channels for interoperability. I do know how the Maytag man feels. Best luck on your selection of repeater. More importantlocation, enviroment, antenna, transmission line, grounding, shelter, accessability, and such. Steve NU5D
Re: [Repeater-Builder] New repeater Motorola or MA/COM
Mark, I am sure sorry to hear about the EFJ's going south. That has not been my experience. I have had a couple of VCO's get noisy and one or two power supplies fail, but this is over a 10 year period. I do hope the manufacturer can get this resolved quickly. Steve NU5D
RE: [Repeater-Builder] New repeater Motorola or MA/COM
Hello, Johnson is not what Johnson used to be... Paul _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of N9WYS Sent: Monday, April 30, 2007 4:42 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] New repeater Motorola or MA/COM Steve and all, FWIW - We [Will County (IL) EMA] have four EF Johnson base/repeater units installed in a trailer designed for “interoperability” here in Illinois, and we’ve had nothing but problems with them… First the VHF went south (and were eventually replaced - by Johnson - with mobiles for our application) and now the UHF has gone likewise. There are 9 such trailers throughout Illinois (coined “ITECS” for Illinois Transportable Emergency Communications System) developed and paid for by the Joint Terrorism Task Force (JTTF) and all are experiencing the same problems. Supposedly a factory rep form Johnson wasn’t even able to resolve the issues… YMMV. Mark – N9WYS Asst Chief – Operations, Will County (IL) EMA / Field Services Division _ From: Repeater-Builder@yahoogroups.com On Behalf Of [EMAIL PROTECTED] I'll take Motorola And EF Johnson Repeaters anytime over the Others . Just my Two cents ... lol 73 Steve. EF Johnson Tech Motorola Tech Try the new PrairieNet toolbar its free: http://prairienet.mycitytoolbar.com No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/780 - Release Date: 4/29/2007 6:30 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/780 - Release Date: 4/29/2007 6:30 AM
RE: [Repeater-Builder] New repeater Motorola or MA/COM
At 03:06 PM 04/30/07, you wrote: Hello, Johnson is not what Johnson used to be... Paul And that statement is just the tip of the iceberg... Talk to any long-term Johnson dealer.
Re: [Repeater-Builder] New repeater Motorola or MA/COM
I have used, programmed, setup, and interfaced both the Motorola and MA/COM equipment. I like both equally. The Motorola Quantar is very nice, and everything is self contained. Not big on the MTR2000 station but they are fine as well. The MA/COM MASTR III repeaters are great also. Only drawback is they are not made for 800/900MHz. Other than that, its really who you want to deal with. Andy - Ahhh...imagining that irresistible new car smell? Check outnew cars at Yahoo! Autos.
Re: [Repeater-Builder] New repeater Motorola or MA/COM
Hello Andy, are you meaning the M3 is not made for 800 Mhz., or not dual band (800/900)? The ones I maintain are 800 Mhz. Steve On 4/30/07, Andrew G. [EMAIL PROTECTED] wrote: I have used, programmed, setup, and interfaced both the Motorola and MA/COM equipment. I like both equally. The Motorola Quantar is very nice, and everything is self contained. Not big on the MTR2000 station but they are fine as well. The MA/COM MASTR III repeaters are great also. Only drawback is they are not made for 800/900MHz. Other than that, its really who you want to deal with. Andy -- -- Ham Radio Spoken Here.NU5D Nickel Under Five Dollars
Re: [Repeater-Builder] New repeater Motorola or MA/COM
Understood - On 4/30/07, Andrew G. [EMAIL PROTECTED] wrote: My bad on that one Steve. Meant to only throw it in as 900. We had a need for a high split 900 station 934-950 and could not get a M3. Still fighting Motorola for a Quantar to use there. Due to the frequency pair we have, it overlaps the two models they make between TX freq RX Freq, but thats another story for another thread. Andy Ham Radio Spoken Here.NU5D Nickel Under Five Dollars
RE: [Repeater-Builder] New repeater Motorola or MA/COM
I worked in a Johnson shop from 1973 to 1983, learned radio there. Learned which Johnson were good and which ones were not. Love the old Fleetcom II 559 and 530 radios. All three of my repeaters on my tower are Fleetcom II's, have not touched any of them in years. The PPL 6060 radios make great little portable repeaters. I just completed a crossband repeater for a balloon launch built out of Johnson's old HT line of radios. Weighs 10 ounces without batteries, the controller adds about 2 I think. Paul WB5IDM _ From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of Mike Morris WA6ILQ Sent: Monday, April 30, 2007 5:29 PM To: Repeater-Builder@yahoogroups.com Subject: RE: [Repeater-Builder] New repeater Motorola or MA/COM At 03:06 PM 04/30/07, you wrote: Hello, Johnson is not what Johnson used to be... Paul And that statement is just the tip of the iceberg... Talk to any long-term Johnson dealer. Try the new PrairieNet toolbar its free: http://prairienet.mycitytoolbar.com No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/780 - Release Date: 4/29/2007 6:30 AM No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.467 / Virus Database: 269.6.2/780 - Release Date: 4/29/2007 6:30 AM
